The image shows three characters from a manga. In the middle

The image shows three characters from a manga. In the middle, there is a girl with short black hair, with a smiling expression. She is wearing a with a jacket and a tie. at your side, there are two boys with serious expressions. They both have dark hair and are wearing jackets.. The boy on the left wears glasses and a cross necklace. The boy on the right is also wearing a jacket, but without the necklace. It looks like they are in a school environment, Possibly in a country the classroom.